Terahertz spectroscopic polarimetry of generalized anisotropic media composed of Archimedean spiral arrays: Experiments and simulations

Terahertz time-domain spectroscopic polarimetry has been used to measure the polarization state of all spectral components in a broadband THz pulse upon transmission through generalized anisotropic media consisting of two-dimensional arrays of lithographically defined Archimedean spirals. The techni...

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Bibliographic Details
Published in:The Journal of chemical physics 2016-05, Vol.144 (17), p.174705-174705
Main Authors: Aschaffenburg, Daniel J., Williams, Michael R. C., Schmuttenmaer, Charles A.
Format: Article
Language:English
Subjects:
Anisotropic media
Anisotropy
Arrays
Broadband
Computer simulation
Matrices (mathematics)
Polarimetry
Spirals
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Summary:Terahertz time-domain spectroscopic polarimetry has been used to measure the polarization state of all spectral components in a broadband THz pulse upon transmission through generalized anisotropic media consisting of two-dimensional arrays of lithographically defined Archimedean spirals. The technique allows a full determination of the frequency-dependent, complex-valued transmission matrix and eigenpolarizations of the spiral arrays. Measurements were made on a series of spiral array orientations. The frequency-dependent transmission matrix elements as well as the eigenpolarizations were determined, and the eigenpolarizations were found be to elliptically corotating, as expected from their symmetry. Numerical simulations are in quantitative agreement with measured spectra.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4947469